Study On Site Selection Optimization Of Construction Waste Landfill Based On GIS

With the continuous advancement of urbanization,the demolition projects of buildings are increasing,which is accompanied by thousands of construction waste.The random accumulation of a large amount of construction waste not only causes the waste of many land resources and environmental pollution,but also affects people’s health.Therefore,the reasonable disposal of construction waste has become a great challenge for urban sustainable development.The most common method of construction waste treatment is landfill,and the construction of construction waste landfill will affect the surrounding environment.Unreasonable site selection will increase the harm to the environment,so the reasonable site selection of landfill is very important.After studying the current situation of construction waste management and landfill site selection in China,it is found that there is less research on construction waste landfill,most of which are only aimed at urban domestic waste and solid waste,and the site selection factors considered in the existing construction waste landfill site selection research are not comprehensive and the method used is single.After determining the research method,taking Changping District of Beijing as the research area,this paper comprehensively collects the data of topography,climate,geology and land use planning of Changping District from relevant research data,official public information and other channels.Then consult the relevant laws and regulations and high-quality papers on the site selection of landfill,and extract the influencing factors of the site selection,including geological conditions,natural conditions,hydrological conditions,traffic conditions and resource conditions.On this basis,with the help of buffer analysis tools and superposition analysis tools of GIS software,combined with attribute analysis,five primary sites are determined.In the primary scheme,the grey situation decision-making method is used to further analyze the suitability,quantify each influencing factor,and determine that the optimal decision-making result is scheme 5-Nanliu village in Liucun town and near Yangfang village in Yangfang town.In this study,the primary selection optimization model of construction waste landfill site is constructed,and the influencing factors of site selection are fully considered,which makes up for the problem of incomplete site selection factors and single method.At the same time,taking Changping District of Beijing as the research area,the optimal decision result of landfill site selection in this area is obtained,which proves the feasibility of this method.It provides scientific reference for the site selection of construction waste landfill in other cities in China in the future.